Accessing metadata to files

I'm developing a simple file manager. So, I have two components: JTree & JTable. When I open some folder in JTree, then JTable is updated according to the content of that folder. JTable contains 3 columns: file_type, file_name, file_bytes. The code works correctly.

Now I need to add some more columns to describe each file in JTable, e.g. file_author, file_description, file_link. How could I assign/read these data to/from files? Should I use metadata?

NIO 2 is the answer to many file-related limitations in Java, but it's part of Java 7, which has major schedule problems. Its highly unlikely that you will see anything released before mid-2011.http://blogs.sun.com/mr/entry/rethinking_jdk7